"What's going on out there?" she shouted through the open door. "Come into this house right now!"

Looking sheepish, the youngsters slowly walked into the kitchen.

"Now what's the trouble?" asked Heather, pretending she didn't know.

"He wants to see my pussy," whispered Penny.

"Why don't you show it to him?" Heather asked.

"Because that would be naughty."

"It might be naughty," giggled Heather. "But all kids like to look at each other's private parts."

"But he's not gonna see mine," Penny argued.

"Well, Billy," his big sister giggled, reaching down and grabbing the crotch of his cut-offs. "It looks like you're out of luck."

"What are you doing?" he gasped in a startled voice.

"Checking to see if you have a hard-on," his big sister answered in a soft voice as she tenderly squeezed the boy's cock through his cut-offs.

"Heather!" he panted. "That isn't nice."

"But it feels nice, doesn't it, Billy?" she grinned, rolling his young prick between her fingers. "Boys love to have their cocks played with."

Billy was too shocked to say anything. He couldn't believe his big sister would play with his prick, but it secretly felt real neat and he could feel his cock starting to get harder.

"Oh, Billy," Heather giggled in a teasing voice. "You're getting a real hard-on. May I see it?"

When he didn't answer, his big sister quickly lowered his zipper and pulled out his hard young cock. It was about four or five inches long and as rigid as steel. Heather could feel the hot cunt juices dripping out of her excited pussy as she gently fondled her brother's stiff prick.